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Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]          
Amortization of intangible assets $ 79 $ 113 $ 157 $ 228  
Estimated annual amortization of intangible assets - Remainder of Fiscal Year 157   157    
Estimated annual amortization of intangible assets - Year One 286   286    
Estimated annual amortization of intangible assets - Year Two 262   262    
Estimated annual amortization of intangible assets - Year Three 237   237    
Estimated annual amortization of intangible assets - Year Four 210   210    
Goodwill [Line Items]          
Goodwill 6,656   6,656   $ 7,989
Goodwill, Impairment Loss     1,307    
Medical          
Goodwill [Line Items]          
Goodwill 3,997   3,997   $ 5,330
Goodwill, Impairment Loss 1,307        
Medical Unit          
Goodwill [Line Items]          
Goodwill 2,800   $ 2,800    
Goodwill, Impairment Loss $ 1,300        
Discount Rate, Fair Value Input     9.00%    
Terminal Growth Rate, Fair Value Input     2.00%